kongarne Messages: 10 Registered: January 2010 Location: Norway
Chancellor
Hi
I was wondering if i was possible to make the volume bigger on the pi4 cabinets (Around 160L)
Making it go a litle deeper, or will it ruin the sound over 150hz?
I have been looking at the 12pi subwoofer, and I really like it, very impressive! I have Been making some lascala cabinets but this looks very advanced , is it possible to get the plans for the subwoofer ?
I guess the best solution is to keep pi4 original and make a subwoofer?
Wayne Parham Messages: 18789 Registered: January 2001
Illuminati (33rd Degree)
If you're going to use subs (as recommended) then there is no point in increasing the volume of the mains.
The problem with changing the dimensions is you have to check internal standing wave nodes, to make sure you don't introduce an anomaly in the lower midrange. Large cabinets have standing waves in the lower midrange, and those frequencies are not adequately attenuated by lining the walls with absorbent material. Large subwoofers don't have this problem because no midrange frequencies are presented to them. But full-range speakers with large cabinets take special care.
You can model the cabinet mathematically to find where the pressure nodes fall, and take care to ensure the midwoofer and port are not placed on one. And acoustic measurements should always be taken of the finished product to ensure the response is ripple-free. But if you are not prepared to do these things, I would suggest sticking with the plans, because they are already vetted. The four π loudspeaker is a mature design, having been in continuous production for over twenty years.
kongarne Messages: 10 Registered: January 2010 Location: Norway
Chancellor
Thank you for quick reply!
This is over my knowledge , so sorry for questions that are ......
If I just make the speaker round and keep the volume and other parameters, is it less chance for ruin the construction sound vice ? (I guess we will not know before it is made and measured)
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